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| Description: Components of the human respiratory system and their functions. The diaphragm and other muscles, as well as certain bones of the axial skeleton, have secondary roles in respiration. Oral Cavity (Mouth) Supplemental airway when breathing is labored Epiglottis Closes off larynx during swallowing Pleural MembraneDouble-layer membrane that separates lungs from other organs; the narrow, fluid-filled space between its two layers has roles in breathing Lung (One of a Pair) Lobed, elastic organ of breathing; site ofgas exchange between internal environment and outside air Intercostal Muscles At rib cage, skeletal muscles with roles in breathing. There are two sets of intercostal muscles (external and internal) Diaphragm Muscle sheet between the chest cavity and abdominal cavity with roles in breathing Nasal Cavity Chamber in which air is moistened, warmed, and filtered, and in which sounds resonate Pharynx (Throat) Airway connecting nasal cavity and mouth with larynx; enhances sounds; also connects with esophagus Larynx (Voice Box) Airway where sound is produced; closed off during swallowing Trachea (Windpipe) Airway connecting larynx with two bronchi that lead into the lungs Bronchial Tree: Increasingly branched airways starting with two bronchi and ending at air sacs (alveoli) of lung tissue (B,C) Location of alveoli relative to the bronchioles and the lung (pulmonary) capillaries. Picture Stats: Views: 83 Filesize: 349.22kB Height: 1258 Width: 1500 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47483 |